Charles



(No Model.) v

U. 0. GRAVES.

. HEATING STOVE.

No. 406,521. Patented uly 9, 1889.

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I UNITED STATES PATENT OFFICE.

CHARLES O. GRAVES, OF WASHINGTON, KANSAS.

HEATING-STOVE.

SPECIFICATION forming part of Letters Patent No. 406,521, dated July 9,1889.

} Application filed April 13, 1888. Serial No. 270,578. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES O. GRAVES, a citizen of the United States,residing at Washington, in the county of Washington and State of Kansas,have invented certain new and usespecification.

My invention relates to heating-stoves, and especially to those having acentral air-tube.

The novelty of my invention lies in the con struotion and arrangement ofthe heatingdrum and air-fines, as hereinafter pointed out.

In the accompanying drawings, Figure 1 is a vertical central section ofa stove embodying my improvements. Fig. 2 is a view of the upper part ofthe stove differently arranged, and Fig. 3 is a detail.

The same referenceletters are used in all the figures.

The stove is provided with the ordinary ash-pit A, grate B, fire-pot C,and door I). The smoke and products of combustion pass oit through asmoke-pipe. (Not shown.)

The body of the stove is of any desired shape, and above the fire-pot issuspended an air-heating drum E, preferably of the form shown,consisting of two frusto-conical sections united at their bases.Thelower end of the drum is connected with the upper end of aninlet-pipe or air-flue F, which commences at the bottom of the stove, atthe rear, and rises vertically behind the fire-pot to a point just abovethe same, where it curves in toward and to the center of the stove, atwhich point it curves upwardly and unites with the drum E. In the upperpart of the vertical portion of the air-flue is an opening closed by adamper f, which is capable of being turned into the flue F, and closesthe flue when it reaches a horizontal position, as indicated by dottedlines in Fig. 1. It may also be placed in an intermediate position, ifdesired. Inside of the drum E is suspended a deflector G, in the shapeof an inverted cone. The distance between the sides of the drum and thetip of the deflector is about one-half the diameter of the opening inthe base of the drum where the flue F enters. The angle between thesides of the deflector is greater than that between the sides of thedrum E, so that the space between them decreases toward the upper edgeof the deflector, which lies in or near the plane of the greatestdiameter of the drum E. Above the deflector the sides of the drumconverge, and about midway of them is a ring or annular flange H,projecting inwardly and downwardly, the width of the ring being a littlemore than .one-half the radius of the drum at that point. Thisconstruction operates to turn the current of air down into the center ofthe drum, thereby holdingitlonger, and also causing a circulation of airin the lower part of the drum within the deflector, all of which greatlyassists in the heating effect. Above the ring H one or more exit pipesor flues I pass from the drum E to the outside of the stove, beingprovided with suitable dampers i.

Surrounding the open top of the drum E is an inturned flange E, fromwhich rises a short neck e, provided with diametrically-opposite slots6'. Fitting inside the neck and resting upon the flange E is a dishedlid or stop-plate K.

The operation of my stove is as follows: Cold aii is drawn into the flueF either from some outside source or from near the floor of the room orfrom a point higher up, the entrance of cold air being controlled by thedamper f. -In its passage through the upper part of the fine the air iswarmed, and when spread into a thin sheet by the deflector G it quicklybecomes heated. The ring H interrupts the air-current and compels it tocirculate within the drum, whence it finally escapes through the flues Iinto the room. In

case it is desired to heat an upperapartment in the house, thestop-plate K is removed, a damper L is journaled in the slots 6, and thelower end of a pipe M is slipped over the neck 6, as shown in Fig. 2.This pipe can be led to any desired point and the hot air deliv-' eredthere. By closing the dampersz' the entire volume of air passing up theflue F is available for warming an upper room.

It will be seen that I do not interfere with the ordinary function ofthe stove as source of radiant heat, but en able it to warm a muchgreater volume of air than it otherwise could. Itcan be used toventilate the room in which it is placed by taking the foul air fromnear the floor and conveying it through pipe M to the outside of thehouse.

7 Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

.1. The combination, with a stove, of the air-heating drum E, suspendedinside of the same, having frusto-conical sides, inlet-flue F, enteringthe stove above the fire-pot, upwardly-inclined exit-pipes I, providedwith dampers z', flange E, an d the removable dished stop-plate K,substantially as described.

2. The combination, with a stove, of an airheating drum E, havingfrusto-conical sides, a conical deflector G, suspended therein, an

inwardly and downwardly inclined annular flange H, above the deflector,inlet-flue-F, entering the stove above the fire-pot, and exitpipes I,substantially as'described.

3. The combination, with a stove, of an airheating drum E, havingfrusto-conical sides, a conical deflector G, suspended therein, anannular flange H, above the deflector, inlet and exit flues, flange E,and stop-plate K, substantially as described.

4. The combination, with a stove, of an airheating drum E, having inletand exit pipes, flange E, provided with a neck 6, having slots 6', and aremovable plate for closing the neck, substantially as described.

In testimony whereof Iaffixmy signature in presence of two witnesses.

CHARLES O. GRAVES.

\Vitnesses:

OMAR POWELL, F. O. GRAVES.

